Mathematics · JEE

Meaning of P(n,r) and C(n,r) Short Tricks for JEE

4+ syllabus-aligned questions available

Quick answer

Short tricks for Meaning of P(n,r) and C(n,r) work only with strong fundamentals. Apply the tips below in timed sets and review every explanation.

Use these Meaning of P(n,r) and C(n,r) shortcuts to save time in JEE Mathematics papers — then validate speed with 4+ MCQs on Goodmarks.

Short tricks for speed

Meaning of P(n,r) and C(n,r) focus drill
Solve 15 mixed MCQs for Meaning of P(n,r) and C(n,r), review every explanation, and note formulas you hesitated on.
Calculus substitution scan
Spot standard forms (sin²x, 1/(a²+x²), e^ax) before integrating — JEE rewards pattern recognition.
Graph sketch shortcut
For coordinate geometry, mark intercepts and asymptotes first; many MCQs need only qualitative graph features.

Part of Permutations and Combinations in JEE Main Mathematics.

Attempt 4 free MCQs for Meaning of P(n,r) and C(n,r). Unlock the full bank with Pro.

Q1MathsUnit 4: Permutations and Combinations

Arrange the following values of

n

in ascending order.

\boldsymbol{A}:^{n} \boldsymbol{P}_{5}=^{n} \boldsymbol{P}_{6} \Rightarrow \boldsymbol{n}=

\boldsymbol{B}:^{\boldsymbol{n}} \boldsymbol{P}_{12}=^{\boldsymbol{n}} \boldsymbol{P}_{\boldsymbol{8}} \Rightarrow \boldsymbol{n}=

\boldsymbol{C}:^{n} \boldsymbol{C}_{(\boldsymbol{n}-\mathbf{3})}=\mathbf{1 0} \Rightarrow \boldsymbol{n}=

\boldsymbol{D}:^{(\boldsymbol{n}+1)} \boldsymbol{P}_{5}:^{\boldsymbol{n}} \boldsymbol{P}_{6}=\mathbf{1}: \boldsymbol{2} \Rightarrow \boldsymbol{n}=

Q2MathsUnit 4: Permutations and Combinations

r>1,

then

\frac{n P_{r}}{n C_{r}}

is This question has multiple correct options

Q3MathsUnit 4: Permutations and Combinations

^{n} \boldsymbol{P}_{r}=\mathbf{3 0 2 4 0}

and

^{n} \boldsymbol{C}_{r}=\mathbf{2 5 2},

then the ordered pair

(n, r)

is equal to:

Q4MathsUnit 4: Permutations and Combinations

^{n} C_{3}=^{n} C_{9},

then

^{n} C_{2}=

Want unlimited Meaning of P(n,r) and C(n,r) practice?

Pro unlocks the full question bank, topic filters, and attempt history.

No — tricks complement concepts. Master the theory first, then use shortcuts in timed MCQ practice.